Table 3
Optical single cylinder engine main characteristics.
| Cylinder displacement | [cm3] | 399.5 |
| Valves | [–] | 4 |
| Stroke | [mm] | 85.8 |
| Bore | [mm] | 77.0 |
| Compression ratio | [–] | 14:1 |
| Tumble level | [–] | 1.5 |
| Intake valve lift duration | [CAD] | 190 |
| EVC/IVO at 1 mm lift | [CAD aTDC] | −10/10 |
| E10 injection mode | [–] | Port injection |